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Title: Hyperfine interaction study of the decoration of the internal wall of nanosized voids by impurity probes
Authors: Deweerd, W ×
Moons, R
Verheyden, Joris
Bukshpan, S
Langouche, Guido
Pattyn, Hugo #
Issue Date: Dec-1995
Publisher: Elsevier science bv
Series Title: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms vol:106 issue:1-4 pages:252-256
Abstract: We observe the trapping of implanted radioactive Co-57 atoms at empty nano-cavities formed in (111) Si by the desorption of He from bubbles. The absorption of 14.4 keV gamma-rays roughly monitors the displacement of the activity, while anodic stripping and counting the remaining 122 keV gamma-ray intensity is employed to obtain an accurate depth profile and to isolate the wanted fraction of the sample. Mossbauer spectroscopy shows that only damage and/or CoSi2-nuclei related sites are present in samples implanted at 300 and 400 degrees C. In a sample implanted with Co at RT at the same side as the cavity-generating He atoms, the Mossbauer spectra reveal two new quadrupole split components after 30 min annealing at 700 degrees C. We present arguments for the tentative identification of these to a cavity edge site (79%, strong bonding) and to a cavity plane site (21%, weak bonding).
URI: 
ISSN: 0168-583X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
Research Unit Biblical Studies
Mechanical Engineering Technology TC, Technology Campus De Nayer Sint-Katelijne-Waver
Technologiecluster Werktuigkundige Industriƫle Ingenieurstechnieken
× corresponding author
# (joint) last author

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